The use of the blowpipe in chemical analysis, and in the examination of minerals / by J.J. Berzelius ; translated from the French of M. Fresnel, by J. G. Children. With a sketch of Berzelius' system of mineralogy; a synoptic table of the principal characters of the pure earths and metallic oxides before the blowpipe, and numerous notes and additions by the translator.

  • Berzelius, Jöns Jakob, friherre, 1779-1848.
Date:
1822
Catalogue details

Licence: Public Domain Mark

Credit: The use of the blowpipe in chemical analysis, and in the examination of minerals / by J.J. Berzelius ; translated from the French of M. Fresnel, by J. G. Children. With a sketch of Berzelius' system of mineralogy; a synoptic table of the principal characters of the pure earths and metallic oxides before the blowpipe, and numerous notes and additions by the translator. Source: Wellcome Collection.

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    JVith borax fuses with great difficulty into a colourless glass. JVith salt of phosphorus decomposes, leaves a silica skeleton, and gives a transparent glass, which becomes opaline on cooling. JVith a small quantity of soda gives a perma- nently transparent glass. With a larger dose the glass becomes opaque on cooling, and milk white by flaming. JVith solution of cobalt the fused edges are blue. 9. Lithium. 1. Amblygonite, from Chursdorf, in Saxony; double sub-phosphate of alumina and lithia, con- taining fluoric acid. (I had the specimen, used in these experiments, from M. Breithaupt.) Alone, in the matrass, gives off a little moisture ; in a good heat the water becomes acid, and attacks the glass. On charcoal fuses very easily into a clear glass, which becomes opaque on congealing. JVith borax fuses readily in any proportion into a transparent, colourless glass. JVith salt of phosphorus fuses instantly, without residuum, into a transparent glass. JVith a little soda fuses ; with a larger dose of the flux intumcsces, and becomes infusible. JVith boracic acid and iron gives phosphuret of iron.